
public class Demo5 {
    private static boolean isQuit = false;

    public static void main(String[] args) throws InterruptedException {
        Thread t=new Thread(()->{
            while(! isQuit){
                System.out.println("hello thread");
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
            }
            System.out.println("t线程结束.");
        });

        t.start();
        Thread.sleep(4000);

        System.out.println("main线程尝试终止 t线程");
        isQuit=true;
    }
}
